Improvement in stereoscopes



H. RIGBY.

Stereoscope.

Patented March 23,1875.

@itmsswa THE GRAPHIC C0.PHOTD.-L|TH.39&41 PARK PLAGE;N.Y-

HENRY RIGBY, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN STEREOSCOPES.

Specification forming part of Letters Patent No. 16L2Y5, dated March 23,1875;-application filed December 24, 1874. I

To all whom it may concern:

Be it known that I, HENRY RIGBY, of the city and county of Philadelphia,and State of Pennsylvania, have invented a new and useful Improvement inStereoscopes, and I do hereby declare the following to be a clear andexact description of the nature thereof, sufficient to enable othersskilled in the art to which myinvention appertains to fully understand,make, and use the same, reference being had to the accompanyingdrawings, making part of this specification, in which-- Figure 1 is acentral longitudinal vertical section of the device emboding myinvention. Fig. 2 is a front view thereof. Fig. 3 is a side view of adetached portion.

Similar letters of reference indicate correspondin g parts in theseveral figures.

My invention consists in the lens-frame, fitted to the box so that itmay be readily removed therefrom. It also consists in a lamp within thebox for illuminating transparent pictures. It further consists in meansfor supporting the views on the conveying-band.

Referring to the drawings, Arepresents the stereoscopic box, which maybe of well-known form and construction. B represents the lensframe oreyeglass-holder, which is fitted into an opening in box A, and adaptedto be removed therefrom. In order to hold the frame in position, Iemploy a catch, 0, which is secured to the box, and engages with a pinor keeper, D, on the frame B.

In cases where the box is to be carried or transported the lens-framemay be removed by releasing the catch from said frame and withdrawingthe latter from the box, whereby the frame may be placed within the boxor otherwise, and is in no danger of breakage or injury.

Within the box, at the rear thereof, there is mounted a lamp orilluminator, E, behind which is a suitable reflector, and said lamp isso arranged that it will illumine transparent views interposed betweenthe lens and lamp, such views being constructed to be illuminated, inorder to properly exhibit their beauty and effect. The chimney of thelamp projects into a guard, F, which consists of a tubular metallicpiece secured to an upward ly-swinging lid, G, at the top of the rear ofthe box. This guard directs the smoke and heat from the box, andprevents the burning thereof. When the lamp is to be removed or lightedthe lid G is swung up, the guard F following the motion, and the lamp isthen accessible. During the exhibition of the views the condition of thelamp may be examined by opening a door, H, at the side of the box. Theviews are advanced by means of an endless band or conveyer, J, and anangular shaft, K, mounted on the sides of the box A, on which shaft theportion of the conveyer which is uppermost has a bearing. By rotatingthe shaft the conveyer is carried around a sufficient distance to bringa view upright in line with the lens. In order to keep the conveyerproperly t'aut, the lowering portion thereof passes around a shaft, J,whose upward movement is limited by blocks K, secured to the inner sidesof the box A, and against which the shaft J comes to a bearing. On theconveyor are secured strips L, whose ends are notched, as at a, andwhose outer faces are grooved as at b.

The view is placed in the groove I), and distended rubber bands Mslipped over the top of the view, at the sides thereof, with the notchedend (0, whereby the view will be nlcel y held, this constructionpermit-ting at any time the removal and application of views.

In order that the views may stand the strain, which is apt to bend thetop edges thereof, I secure thereto metallic strips N, which stiffen theviews and protect their upper edges.

When light is to be thrown on the views in front, the front lid P isopened and manipulated in a manner similar to that in common use. Thebox will be provided with suitable openings for admission of air to thelamp.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The stereoscopic box A, in combination with the removable eyeglass orlens frame B and catch 0 D, substantially as and for the purpose setforth.

2. The stereoscopic box A, provided with stereoscopic lens andlens-frame in front, an I), in combination with the vertically-arrangedilluminator at the rear, and a revolving viewrubber bands M,substantially as and for the holder arranged between the lens andillumipurpose set forth.

nator, substantially as and for the purpose set HENRY RIGBY. forth.Witnesses 3. The view-holder, constructed of the piece JOHN A.WIEDERSHEIM,

L, with horizontal notch a and vertical grooves ALBERT H. HoEcKLEY.

